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bb0b314205
linux/drivers/tty
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Sebastian Andrzej Siewior bb0b314205 serial: rda: Use uart_prepare_sysrq_char() to handle sysrq. 
The port lock is a spinlock_t which is becomes a sleeping lock on PREEMPT_RT.
The driver splits the locking function into two parts: local_irq_save() and
uart_port_lock() and this breaks PREEMPT_RT.

Handle sysrq requests sysrq once the port lock is dropped.
Remove the special case in the console write routine an always use the
complete locking function.

Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-unisoc@lists.infradead.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20240301215246.891055-12-bigeasy@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-03-02 22:06:21 +01:00
..
hvc Merge 6.8-rc6 into tty-next 2024-02-27 06:22:13 +01:00
ipwireless tty: ipwireless: remove unused ipw_dev::attribute_memory 2023-11-23 19:16:03 +00:00
serdev serdev: make serdev_bus_type const 2024-02-06 14:35:38 +00:00
serial serial: rda: Use uart_prepare_sysrq_char() to handle sysrq. 2024-03-02 22:06:21 +01:00
vt tty/vt: Corrected doc of vc_sanitize_unicode(), vc_translate_unicode() 2024-02-17 17:44:46 +01:00
amiserial.c tty: amiserial: Convert to platform remove callback returning void 2024-02-19 09:40:50 +01:00
ehv_bytechan.c tty: ehv_bytechan: convert to u8 and size_t 2023-12-08 12:02:37 +01:00
goldfish.c tty: goldfish: Convert to platform remove callback returning void 2024-02-19 09:40:50 +01:00
Kconfig vt: remove superfluous CONFIG_HW_CONSOLE 2024-01-27 19:03:51 -08:00
Makefile
mips_ejtag_fdc.c tty: mips_ejtag_fdc: use u8 for character pointers 2023-12-08 12:02:37 +01:00
moxa.c tty: moxa: convert to u8 and size_t 2023-12-08 12:02:38 +01:00
mxser.c tty: mxser: convert to u8 and size_t 2023-12-08 12:02:38 +01:00
n_gsm.c tty: n_gsm: convert to u8 and size_t 2023-12-08 12:02:38 +01:00
n_hdlc.c tty: n_hdlc: convert to u8 and size_t 2023-12-08 12:02:38 +01:00
n_null.c tty: ldops: unify to u8 2023-08-11 21:12:47 +02:00
n_tty.c tty: invert return values of tty_{,un}throttle_safe() 2023-10-03 14:31:15 +02:00
nozomi.c tty: nozomi: convert to u8 and size_t 2023-12-08 12:02:38 +01:00
pty.c tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
rpmsg_tty.c tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
synclink_gt.c tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
sysrq.c /proc/sysrq-trigger: accept multiple keys at once 2023-11-25 07:23:16 +00:00
tty_audit.c tty: audit: unify to u8 2023-08-11 21:12:46 +02:00
tty_baudrate.c
tty_buffer.c tty: Don't include tty_buffer.h in tty.h 2024-02-18 18:59:59 +01:00
tty_io.c USB / Thunderbolt changes for 6.8-rc1 2024-01-18 11:43:55 -08:00
tty_ioctl.c tty: allow TIOCSLCKTRMIOS with CAP_CHECKPOINT_RESTORE 2023-12-15 14:20:03 +01:00
tty_jobctrl.c tty: tty_jobctrl: fix pid memleak in disassociate_ctty() 2023-09-18 11:14:43 +02:00
tty_ldisc.c tty: tty_ldisc: Remove the ret variable 2023-03-09 17:11:18 +01:00
tty_ldsem.c
tty_mutex.c
tty_port.c tty: switch tty_port::xmit_* to u8 2023-12-08 12:02:37 +01:00
tty.h tty: convert THROTTLE constants into enum 2023-10-03 14:31:16 +02:00
ttynull.c tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
vcc.c tty: vcc: Add check for kstrdup() in vcc_probe() 2023-09-18 11:14:42 +02:00